Hey VonIs_Realz!
I think you should take what I have to say, I’ve been building and modeling for 8 years now. Unfortunately, some of the people above this comment are giving you very vague and wishy washy advice. I want to make it simple and give you options with tangible actions.
What do I do to become a Low Poly builder? / How do I 3D Model?
There is no such thing as a low poly builder, a lowpoly 3d modeler is the term you’re looking for. The whole goal of lowpoly is to create optimized models with the least triangles/polygons as possible. It’s a functional aesthetic. This is not achievable with roblox primitives (parts, cylinders, wedges, spheres).
3D Modeling can be done with any software, Blender, 3DsMax, Sketchup, Maya, however I recommend you start with blender because it’s free.
It is not hard nor is it easy, it is time consuming.
It takes a significant amount of your time invested to be a proficient modeler. Here is a great resource that I suggest you learn from.
Source (Grant Abbit): https://www.youtube.com/channel/UCZFUrFoqvqlN8seaAeEwjlw
How do I become a successful builder?
Quite literally start, just do it. Sounds vague but there’s no class or school you can take. You start creating what you like, your room, something that you like. It’s going to be crap. You do it again, it’s less crap. Eventually you build and catch onto the patterns, and play with colors better. It’s a process and no one on this devforum can define your style but you.
You can imitate people’s work, and I highly recommend you get geometry plugins like resize align, reflect, Archimedes, if anyone ever attempts to tell you that plugins make you a bad builder they know absolutely nothing and should not be used as a resource.
No one here can answer this, it’s going to be a long time of unrecognized work until you create something that everyone can acknowledge is noteworthy. It heavily depends on what success means to you, notoriety or money.
TLDR:
What do I do to become a Low Poly builder?
Don’t. Unless you want to poorly imitate results from blender.
How do I 3D Model?
Start with blender, it’s free.
How do I become a successful builder?
Start, practice, revise, and practice. Once you’re done, post your work for others to critique or to praise. Your reflected appraisals can shape how your work impacts others.
Also, in the future just acknowledge the DevForum is a great place for community but you won’t always get the definitive answer you’re looking for.
Conclusion
I wish you the best of luck, go ahead and post on any public medium you want with your work and if I’m in it just tag me. My contact is BloodSpring#5080. I’m interested in seeing what you can create! Good luck.